6N3P-DR (original box)

A rare Russian 6N3P-DR vacuum tube (6Н3П-ДР rus.) with separate indirectly heated cathodes. Designed for voltage amplification and high-frequency oscillation generation. The 6N3P-DR double triode is used as a high-frequency amplifier with a grounded grid, as well as a mixer or local oscillator in VHF radio equipment. It can be used in low-power VHF receivers, pulse circuits, and low-frequency preamplifier stages.
Works in any position.

6N3P-DR is a close equivalent to tubes: 2C51, WE 396A, ECC42, 5670(W), 6CC42.

D – tube with special durability;
R – characterizing the increased reliability of the tube.

• Military acceptance stamp ” B☆П “
• Stamp of technical control department of the manufacturer ” ОТК “

Technical specifications:

• Filament voltage: 6.3 ± 0.6V
• Filament current: 350 ± 30mA
• Anode voltage nominal (constant): 150V
• Anode voltage limit (constant): 300V
• Anode current of each triode: 8.5 ± 3.5mA
• The cathode current of each triode is limiting: 18mA
• Grid voltage nominal (constant): -2V
• Reverse grid current of each triode: not more than 0.1μA
• Power dissipated by each anode: maximum 1.8W
  The voltage between the cathode and the heater is limiting (constant):
  – at the negative potential of the heater 150V
  – at positive heater potential 100V
• Slope per triode: 5.9 ± 1.9mA
• Gain of each triode: 36 ± 8
• Input impedance at 60MHz: 14kOhm
• Output impedance at 60MHz: 19kOhm
• Equivalent tube noise resistance: 0.7kOhm
• Input capacitance of each triode: 2.45 ± 0.55pF
• Output capacitance of each triode: 1.25 ± 0.35pF
• Capacitance through passage of each triode: not more than 1.6pF
• Capacitance between anodes: no more than 0.13pF

Operating time not less than 10000 hours.